Bobbin-stripping machine.



C. S. BURNETT.

BOBBIN STRIPPING MACHlNE.

APPLICATION FILED 0611,1913,

1,260,867. Patented Mar. 26,1918.

l 2 SHEETS-SHEET l.

Wilnesses. lnvenTor.

- Charles S. Burnett, b W 929. m- An a.

C S. BURNETT.

BOBBIN STRIP P MACHINE. APPLICATION FIL 0 T. I. I913.

1,269,867, Patented Mar. 26, 1918.

2 SHEETS-$HEET 2! Fig 3 j enter. Char! .Burnetl. byMWiW UNITED sea IGHABIIES BURNETT, 0F HOLYOKE, MASSACHUSETTS.

. .BOBIBIN-STRIPPING MACHINE.

To all whom it may concern:

Be it known that I, CHARLES, S. BURNETT, a citizen of the United States, residing at 'Holyoke, county of Hampden, State of- Massachusetts, have invented an Improvement in Bobbin-Stripping Machines, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to improvements in bobbin strippers for removing the waste from bobbins used in automatic replenishing looms.

, One of the objects of the present invention isto simplify the construction of bob- Jbin stripping machines, and to provide mechanism which will cleanly remove the waste from the barrel of the bobbin at a rapid rate.

Another object of the invention is to provide a bobbin stripper which can be easily supplied with bobbins by an unskilled 'workman, and which will not be likely to cause injury if the hand of the workman should become engaged in the stripping jaws.

Another object of the invention is to provide a double acting machine in which a plurality of operators may be employed in feeding bobbins to the stripping devices, and whereby the bobbins will be alternately stripped, thereby increasing the efiiciency of the machine, economizing floor space, and saving power.

In the resent invention these objects are attained by the provision of a stationary pair of stripping aws, which are yieldingly pressed together with such comparatively light pressure that the engagement of the operators finger in said jaws will not cause seriousinjury, and by the provision of a reciprocating gripper adapted to engage the base of the bobbin and draw the barrel said barrel. A more complete disclosure of the objects and nature of this invention will appear from the following description and drawing, and the annexed claims.

In the'drawingsn, Figure 1 represents the side-view of the machine partially broken away to show the driving mechanism. 1

Fig. 2 is a plan view of the machine showing, in dotted lines, mechanism for opening and closing the stripping jaws.

Fig. 3 is an enlarged plan view of the stripping jaws and the grippers, showing the same in engagement with the bobbin, a portion of the jaws and of the gripping Specification of Letters Patent. Patented Mar, 26, 1918,; Application flied October 1, 1918. Serial No. 792,715. 7 v

mechanism being broken away to more fully illustrate its construction.

Fig. 4 is a vertical sectional view in a plane adjacent to the faces of the stripping aws, and

Fig. 5 is a side elevation of the bobbin lying upon the bobbin supports showing a portion of one of the stripping jaws, and the portion of the guide for the bobbin base in section. I

In a preferred embodiment of the invention illustrated in the drawing a table is provided comprising a top 1 supported by suitable legs 2, and having cross-bars 3 securing the lower ends of the legs together in the ordinary manner, and vertical posts or legs 4 adapted to support the driving mechanism, hereafter to be described. v

The stripping mechanism, which comprises two sets of oppositely disposed stripping jaws and a reciprocating cross-head carrying gripping mechanism at each end, is supported upon the top 1 of the table, the actuating mechanism therefor being located beneath said table top, so that it is concealed from the reach of the operator.

The stripping mechanism comprises a pair bobbin by the contact of the stripping jaws therewith. By constructing the jaws of fibrous material such as wood the granular ends of the fibers engage more effectively the fibers of the waste which remains upon the bobbin and this fibrous engaging surface remains notwithstanding the wearing down of the bobbin engagingface presenting a somewhat roughenedsurface, instead of a smooth polished surface such as would be by suitable adjustable bolts 13, by which the causing the ends of the levers 1O, 11 to ap} tension upon said springs may be adjusted as desired. The springs 12 serve normally to keep the jaws 5, 6'closed,

In order to, provide for the ready insertion of thebobbin, means are provided-for proach each other, and thereby separate the jaws. This mechanism, in the form illustrated in the drawing, comprises a bell crank lever 14 pivoted at its elbow upon a bolt 15 which enters the bottom of the table top 1. One end of the lever 14 is adapted to engage the outer edge of the lever 10, and upon actuation press the same inwardly. Attached to this end of the lever is a link 16 which is pivotally connected at its other end to a lever 17,'which is likewise pivoted near its middle upon a bolt 18 extending into the table top 1. The other end of the lever 17 engagesthe outer edge of the downwardly extending lever 11 of the jaw 6. Motion is given to the bell crank lever through a link 19 which engages'a cam 20 upon a countershaft 21, which is driven in turn .through suitable gearing from the main shaft 22 which is journaled in the bearings carried by the upright 4, and has a loose pulley 23 and a tight pulley 24 provided with suitable belt shifting mechanism .25.

In the embodiment of the invention shown in the drawing the end of the link 19 is connected to a link-26, one end of which is pivoted at 27 to the frame of the machine, the cam 20 engages the side of the links 26, and

- thereby operates the bell crank lever. These parts may be made in duplicate and oppositely disposed at the ends of the table 1. It will be obvious from the above description read in connection with the drawings that when the cam 20 engages a link 26 and forces'the same toward the end of the table it will cause the bell crank lever to rock upon its pivot 15, thereby pressing its other end against the lower lever 10 of the jaw, and

at the same time, throu ghthe connection 16, operate the lever 17 to press its end against the'lever 11 of the jaw 6, thereby causing the le'vers 10 and 11 to approach each other and consequently opening the stripping jaws for the reception of the bobbin.

Thegripping mechanism comprises a reciprocating cross-head 28 which, as illustrated in the drawing, is substantially square guides 32 which are adapted to cooperate with the grippers, hereinafter to be described.

The cross head is provided at each end with mechanism adapted to engage the base of a bobbin supported in the stripping jaws.

In the preferred form of the invention illustrated in thedrawings herein, the ends of ,the cross head are recessed to receive the fulcrums of the levers 33. The forward ends or the levers 33 are provided with serrated jaws 34, said jaws being rounded at their ends in such a manner as to slide easily over the base of the bobbin, when thrust against the same, the serrations in said jaws. being adapted to engage the rings upon the bobbin base. The rearward ends 35 of said levers 33 arecurved, and areadapted upon retraction to enter between and engage the guides 32, for the purpose of opening the aws to discharge the strippedbobbin. The jaws of the gripper are normally held in a relatively close position by springs 36, which are seated in recesses 37 in the cross head 28, and abut against the inner edges of said levers 35.

Any suitable mechanism may be used for reciprocating the cross head 28. In the embodiment of the invention shown in the drawing, this mechanism consists of a substantially vertical lever 38 pivoted at its bottom upon a cross shaft 39 mounted upon the cross pieces 3 of the frame, and connected at its upper end by a pin and slot comiection 40 to the cross head 28. This lever is rocked about its pivotal support 29 through a crank 41-upon the shaft 21 which drives a pitman 42 which is pivotally connected to an adjustable sleeve 43, embracing the lever 38 somewhat above the middle. The sleeve 43 is provided with a set screw 44, which is adapted to secure the same in any desired position. It will be observed that by adjusting the sleeve 43 along the lever 38 toward or from its pivot 39, the amplitude of vibration of the cross head 40 may be accurately determined. This feature of adjustment is important for the reason that it is desirable to have the gripping jaws carried just far enough to engage the rings on the base of the bobbin, as further movement would not only be useless, but would cause the likelihood of the faces of the jaws scratching the bobbin base. Furthermore, any substantial movement of the jaws beyond their proper positions would result in contacting with the stripplng jaws, and would be likely to damage the same.

I The bobbin may beproperly supported in its place between the gripping jaws by suit- I.

able guides.- As illustrated in the drawing, "thebarrel of the bobbin is supported upon a guide 45, which is constructed of wood, and 'the base of the bobbin is supported by a guide 46, which, as illustrated, comprises an angular metallic support which'is secured to the table top '1 in any suitable manner, and extends upwardly therefrom to the proper height to aline the bobbin with the concave portion of the stripping jaws, and is then out at ri ht angles to for the be bin base.

In order to'insure the proper positioning of the bobbins upon the supports and between the stripping jaws, a guide may be provided for directing the base of the bobbin into proper position. As illustrated in the drawing, this guide comprises a vertical plate 47 concaved at its inner ortion 48 to rovide a channel-which will direct the bobin medially of the stripping jaws, and to position it so that the grippers may properly engage the rings upon the bobbin base. The lower portion of the guide is cut away at 49 to provide a passage for the gripping jaws when the same advance to engage the base of the bobbin, as is illustrated in Fig. 5. r

In operating the device the operator grasps the bobbin by the barrel or spindle, and places the same between the stripping jaws so that the jaws are adjacent to the base of the bobbin. This ositioning of the bobbin occurs, of course, uring the period that the1 jaws are open. The gripper then advances and the jaws are closed simultaneously therewith. When the gripper has reached nearly the extent of its' forward movement, the forward ends of the levers 33 ride up over the base of the bobbin, which is, at that time, held from longitudinal movement by the stripping jaws, and the serrations 34 engage over the rings of the bobbin base. Upon the reverse movement of the cross head the bobbin is drawn through the stripping'jaws, and the waste filling upon the bobbin is stripped ofi over the nose of the bobbin. Upon nearing the limit of the backward movement of the cross head, the arms 35 of the levers 33 engage the guides 32, which cause the arms 35 to approach each other, thereby opening "the jaws of the gripper and releasing the bobbin which drops I 5 into a suitable bobbinchute 50, or other suitable receptacle. r

- In the preferred form ofthe' invention the reciprocating c'ross' head is provided at each end with gripping jaws, and suitable stripping members are provided to cobperate therewith, as above'set forth. It will be obwious thata plurality of cross heads may be joined together, if 'foundnece'ssary ordesirable, andthat such duplication may be congive a broad support tinued until as many strippersas are desirable are provided.

B reason of the simple cpnstruction of the obbin stripper above described, them is little liability to breakage which will put the device out of commission and thereb the supply of bobbins for refilling. his is, of course, very important, sincea failure of the bobbin stripper to operate would be likely to cause an accumulation of bobbins bearing waste, and if the supply of stripped bobbins should become exhausted, would delay the operation of the looms. j

The device above described is also of such a character that bobbins may. be placed therein by an unskilled operator, since it involves merely the placing of the bobbin between the strippin jaws. If the bobbinis placed improperly between the jaws no harm is done, for the reason that the jaws. will either thrust it out of the way, or ifthey succeed in gripping, will properly strip the same. Furthermore, the stripping jaws'being yieldably mounted, and the springs 12 of light tension, the operator will not become injured if the fingers should accidentally be come engaged by the stripping jaws. The gripping jaws are normally held a suflicient distance apart by a separator 51 to 0 over the bobbin base, and there is there ore no danger of the operators hand becoming caught in this large opening. Even if it should occur, the gripping jaws are likewise fyieldably mounted and are positively reeased at the end of the stroke. This construction. renders it almost impossible for an operator to be injured'in any way, especially as the driving mechanism is wholly concealed beneath the table. The stripping performed by this device is found in practice to be exceedingly eificient and the speed of the operation of-the device is, of course, limited only by the fiapacity of the operators to feed bobbins into the. same. I

By reason of the fact that the stripping jaws remain stationary while the gripping mechanism reciprocates, and stand above the surface of the table, there is no likelihood of the waste becoming soiled by oil or dirt. 1n the operation ofthe strippin machine the waste from the stripped b0 bin falls from the table in" frontof the-operator and can be readily pushed therefrom into a suitable receptacle.- I ,Having fully described 'my invention, "that I claim as new, and desire to secure by Letters Patent is: i

1. In a bobbin stripping machine comprising a pair of yieldable strippingjaws, a re I ciprocating cross-head, a pair of yieldable gripping aws pivoted at the endthereof and having rearwardly extending shanks,'means base of a bobbinand draw the barreLthereof through said stripping jaws, and guides adapted to compress the shanks of said gripping jaws upon their retraction and thereby cause them to release the bobbin.

2. In a bobbin stripping machine, yieldable stripping jaws adapted to engage the barrel of a bobbin, means for separating said stripping jaws for the reception of the bobbin, a support for said bobbin, a guide for thebase thereof, a reciprocating gripper adapted to engage the base of the bobbin and draw the barrel thereof through said stripping jaws, and means for releasing the stripped bobbin from said gripper.

3. A double acting stripper comprising a. plurality ofsets of stripping members and 4 a reciprocating member having means adapted to alternately engage bobbins held by the respective stripping members and draw the barrels thereof through said strip-' ping members. 1

4. A double acting bobbin stripper comprising two sets of stripping members, "a reciprocating cross-head having grippers at its opposite ends adapted to engage bobbins held by said stripping members, and means for reciprocating said cross-head.

5. A double acting bobbin stripper comprising two sets of stripping jaws adapted to engage the barrels of bobbins, a reciprocating cross-head, a pair of grippers pivotally mounted upon each end of said crosshead and ada ted to engage the bases of bobbins held y the respective stripping jaws and means for releasing the stripped bobbins from said grippers.

6. A bobbin stripper comprising stripping members, a gripper having spring jaws adapted to engage the base of the bobbin and draw the barrel thereof through said stripping means, a crank shaft connected to said gripper and means intermediate of said crank shaft and said gripper for adjusting the amplitude of movement of said gripper.

7 A bobbin stripper comprising stripping members, a reciprocating cross head having grippers adapted to engage the base of the bobbin and draw the barrel thereof through said stripping members, means for reciprocating said cross head comprising a lever pivotally connected to said cross head, a crank shaft and a pitman adjustably connected to said lever intermediate of its ends and journaled upon said crank shaft whbreby the amplitude of movement of the recipro'cating cross head and grippers may be adjusted.

S. A bobbin stripper comprising stripping members, a reciprocating. cross-head having grippers at its opposite ends adapted to engage bobbins held by said stripping members, and means for reciprocating said its opposite ends adapted to engage bobbins held bysaid stripping members, means for reciprocating said cross-head comprising a lever and a pitman adjustablyv connected to said lever intermediate of its ends, whereby .the amplitude of movement of said crosshead'may be. adjusted, and means for actuating said pitman.

10. A bobbin stripper comprising a pair of yieldably mounted concaved strip ing jaws, a pair of slotted standards, in al ment with the concaved openings in said jaws, antifriction rolls in said standards, a reciprocating cross head carried by said rolls having grippers at its end adapted to engage bobbins held by said stripping members, means for reciprocating said cross head and means carried by saidstandards adapted to open said stripping jaws to release the bobbin therefrom.

11. In a bobbin stripping machine comprising a pair of stripplng aws at each end of the machine and means consisting of positively operated gripping members 00- operating with said stripping jaws to draw the barrel of the bobbin through said stripping jaws, removable faces of fibrous material for said, jaws adapted to engage the bobbinbarrel during the stripping operation whereby injury to the bobbin barrel will be prevented.

12. In a bobbin stripping machine comprising a pair of strippmg jaws at each end of the machine and means consisting of positively operated gripping members cooperating with said stripping jaws to strip a bobbin, wooden faces for said jaws of softer material than the barrel of the bobbin which are engaged thereby during the stripping operation.

13. In a bobbin stripping machine, a slide and means for reciprocating the same, a pair of bobbin gripping jaws at each end of the slide, mea s. for actuating these jaws to cause them togrip the head of the bobbin, means for actuating these jaws to cause them to release the bobbin as the slide approaches the center of the machine, and automatic -.means for stripping the waste yarn from the bobbin during the inward movement of each end of the slide. 7

14. A bobbin stripper comprising a table, stripping members having bobbin engaging means and a relatively movable cooperating gripper adapted to draw a bobbin through said stripping members to remove the waste therefrom mounted on said table, of means the respective stripping members and move for actuating said stripping members and the barrels thereof through said stripping said gii per located wholly beneath said members. v

table an concealed thereby, whereby the op- In testimony whereof, I have signed my 5 erator is protected from injury. from said name to this specification, in the presence of 15 actuating means. two subscribinglvgiltriesses.

15. A double acting stripper comprising a C ES '8. BURNETT.- plurality of sets of stripping members and a Witnesses: v .reciprocatin member having means ada t- I LILLIAN F. EGAN,

I0 ed alternate y to engage bobbins held by JAMES Tmimm'.

copies of this patent may be obtained for five cents each, by addressing the Gem of Patents,

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